INFITTM technology makes the cables easy to strip for fast and safe connection

Fire safety is one of the most important aspects in the design of modern rolling stock, especially when trains are travelling through tunnels. If there is a fire break out it is vital that the passengers and crew can rely on the onboard cabling to maintain power and control system operation to ensure that the train can continue on to a safe place. As part of its ongoing commitment to boost rail passenger safety in fire situations, Nexans launches the innovative FLAMEX® Ethernet FR line of fire-resistant communication cables.

Excellent fire performance…

The FLAMEX® Ethernet FR line of fire-resistant communication cables has been developed by Nexans to maintain integrity during a fire, enabling train crew to continue using key communication and control systems despite the propagation of the flames through the train coaches. In common with all Nexans’ FLAMEX® cables, the FR Ethernet range also helps to limit the spread of potential fires and the release of harmful smoke as required by the EN 5545 standards.

Yannick Goutille, Nexans Global Product Manager for Rolling Stock, says: “Safety is a key concern for Nexans and our customers, transit authorities and manufacturers. This new FLAMEX® FR range meets the most stringent regulations in the industry while maintaining performance, and therefore safety.”

The FLAMEX® Ethernet FR cables can reach data transmission performances for Category 5 as described in the ISO/CEI 11801 standard while showing no loss of data train and no drop of the transmission parameters when burnt. This performance is made possible by Nexans uniqueINFITTM technology for fire resistant cables in which the cable insulation, when exposed to fire, transforms from a flexible plastic covering to a tough insulating ceramic layer. Nexans FLAMEX® Ethernet FR cables have a working temperature range of -40°C to + 85°C.

…coupled with innovative design

In addition to fire performance, INFITTM technology makes it easier and faster to prepare the cables for “connection with rolling stock connectors compared to older taping technologies. From a design perspective, the FLAMEX® Ethernet FR cables also help to save weight on board by eliminating heavy mechanical protections and moving to the state-of-the-art communication systems.

For regular operations, the FLAMEX® Ethernet FR cable provides long service life with protection by EMC braided shield and cable sheath capable of withstanding harsh railway operating conditions such as variations in temperature, snow, rain, sunlight, heavy vibration or electromagnetic disturbances.

Finally, in addition to being fire retardant, the new FLAMEX® Ethernet FR range of power, control and communication cables is also designed to emit low levels of smoke during a fire. The cables are compliant with EN 45545-2 requirements for the highest hazard level class and meet fire resistance requirements laid out by EN 50200 or IEC 60331 standards. The range is also asbestos-free and RoHS (Restriction of Hazardous Substances) compliant.

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